Education Technology

Hot Air Balloon

Published on 09/09/2010

Activity Overview

Students model integer addition and subtraction by adding or subtracting the amount of helium and sandbags for a hot air balloon.

Key Steps

  • Image

    Students begin by understanding the concepts of adding helium bags and sand bags to change the balloon’s position, and how the helium and sand bags are related to positive and negative integers. 

  • Image

    The model in Problem 2 displays two balloons side by side and is used to find a missing addend when the sum and the other addend are given.